Weyl nodes in the odd-parity superconductor UTe<sub>2</sub>

ORAL

Abstract

UTe2 has recently been found to be an example of a spin-triplet superconductor that exhibits evidence for chiral Majorana surface states. Here we present general symmetry and topology arguments relating to Weyl points that can account for these surface states. This will be followed by an analysis of the superconducting state of a DFT+U inspired model for UTe2. This model supports a B2u+iB3u superconducting pairing state that is consistent with polar Kerr measurements. We find this state has four Weyl point nodes and we numerically examine the resultant surface Fermi arc states. Theses states reveal unexpected properties that can be accounted for by our general symmetry arguments.

*We acknowledge the supports of the Distinguished Dissertation Fellowship by the University of Wisconsin-Milwaukee and DOE DE-SC0021971.

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Publication: T. Shishidou, H. G. Suh, P. M. R. Brydon, M. Weinert, and D. F. Agterberg, Topological band and superconductivity in
UTe2, Phys. Rev. B 103, 104504 (2021).

Presenters

  • Han Gyeol Suh

    • University of Wisconsin - Milwaukee

Authors

  • Han Gyeol Suh

    • University of Wisconsin - Milwaukee

  • TATSUYA SHISHIDOU

    • University of Wisconsin - Milwaukee

  • Philip Brydon

    • Univ of Otago

  • Michael Weinert

    • University of Wisconsin - Milwaukee
    • Department of Physics, University of Wisconsin, Milwaukee, Wisconsin 53211, United States

  • Daniel F Agterberg

    • University of Wisconsin - Milwaukee

  • Yue YU

    • Stanford Univ
    • Stanford University